From mboxrd@z Thu Jan 1 00:00:00 1970 From: Chris Zhong Subject: [PATCH v10 2/4] ARM: rockchip: Add pmu-sram binding Date: Mon, 1 Dec 2014 16:52:18 +0800 Message-ID: <1417423940-1669-3-git-send-email-zyw@rock-chips.com> References: <1417423940-1669-1-git-send-email-zyw@rock-chips.com> Return-path: In-Reply-To: <1417423940-1669-1-git-send-email-zyw@rock-chips.com> Sender: linux-kernel-owner@vger.kernel.org To: heiko@sntech.de, dianders@chromium.org Cc: mturquette@linaro.org, Ian Campbell , Russell King , Rob Herring , Pawel Moll , Mark Rutland , Linus Walleij , khilman@kernel.org, linux-rockchip@lists.infradead.org, Chris Zhong , Tony Xie , Kumar Gala , devicetree@vger.kernel.org, linux-kernel@vger.kernel.org List-Id: devicetree@vger.kernel.org The pmu-sram is used to store resume code, suspend/resume need get the address of it. Therefore add a binding and documentation for it. Signed-off-by: Tony Xie Signed-off-by: Chris Zhong Reviewed-by: Doug Anderson --- Changes in v10: None Changes in v9: None Changes in v8: None Changes in v7: None Changes in v6: - change pmu_intmem@ff720000 to sram@ff720000 Changes in v5: - change the size of sram in example Changes in v4: None Changes in v3: None Changes in v2: None .../devicetree/bindings/arm/rockchip/pmu-sram.txt | 16 ++++++++++++++++ 1 file changed, 16 insertions(+) create mode 100644 Documentation/devicetree/bindings/arm/rockchip/pmu-sram.txt diff --git a/Documentation/devicetree/bindings/arm/rockchip/pmu-sram.txt b/Documentation/devicetree/bindings/arm/rockchip/pmu-sram.txt new file mode 100644 index 0000000..6b42fda --- /dev/null +++ b/Documentation/devicetree/bindings/arm/rockchip/pmu-sram.txt @@ -0,0 +1,16 @@ +Rockchip SRAM for pmu: +------------------------------ + +The sram of pmu is used to store the function of resume from maskrom(the 1st +level loader). This is a common use of the "pmu-sram" because it keeps power +even in low power states in the system. + +Required node properties: +- compatible : should be "rockchip,rk3288-pmu-sram" +- reg : physical base address and the size of the registers window + +Example: + sram@ff720000 { + compatible = "rockchip,rk3288-pmu-sram", "mmio-sram"; + reg = <0xff720000 0x1000>; + }; -- 1.9.1